condition mean min max ZT0-3 1.68859 1.6781899999999998 1.69899 ZT4-7 0.6518765 0.6518765 0.6518765 ZT8-11 0.4028595 0.4028595 0.4028595 ZT12-15 0 0 0 ZT16-19 1.0113105 1.0113105 1.0113105 ZT20-23 0.817611 0.817611 0.817611